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Axial Ratio Axial Ratio Circular polarization conversion (CP)

Axial Ratio Circular polarization conversion (CP)  Axial Ratio Axial Ratio Circular polarization conversion (CP) of the proposed Metasurface is further established by the axial ratio (AR) of the reflected wave,                                          𝐴𝑅 = ( |𝑅𝑦𝑦| 2 +|𝑅π‘₯𝑦| 2 +βˆšπ‘Ž |𝑅𝑦𝑦| 2 +|𝑅π‘₯𝑦| 2 βˆ’βˆšπ‘Ž ) 0.5  Where                          a = (|Ryy| 4 + |Rxy| 4 + 2|Ryy| 2 |Rxy| 2 cos(2Ξ”Γ˜yx)                                                                   and βˆ†βˆ…π²π± = βˆ…π²π² βˆ’ βˆ…π±π²  The reflection coefficient of the design surface is shown in Figure. The co-polariz...
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Axial Ratio Axial Ratio Circular polarization conversion (CP)

Axial Ratio Circular polarization conversion (CP) 

Axial Ratio

Axial Ratio Circular polarization conversion (CP) of the proposed Metasurface is further established by the axial ratio (AR) of the reflected wave, 

                                π΄π‘… = ( |𝑅𝑦𝑦| 2 +|𝑅π‘₯𝑦| 2 +βˆšπ‘Ž |𝑅𝑦𝑦| 2 +|𝑅π‘₯𝑦| 2 βˆ’βˆšπ‘Ž ) 0.5 

Where                     a = (|Ryy| 4 + |Rxy| 4 + 2|Ryy| 2 |Rxy| 2 cos(2Ξ”Γ˜yx) 

                                                    and βˆ†βˆ…π²π± = βˆ…π²π² βˆ’ βˆ…π±π² 



The reflection coefficient of the design surface is shown in Figure. The co-polarized and cross-polarized reflected waves have the same magnitude at 9.6 GHz and 17 GHz is 0.7. The surface behaves at these points as a CP which converts the linear EM wave into a circular EM wave.



The numerical value of the axial ratio is shown in Figure. At 9.6 GHz and 17 GHz, the axial ratio value is lower than the 3dB dotted black line which shows that the design surface has the ability of CPC, to convert 9.6 GHz, 10 GHz, and 16.5 GHz to 17 GHz linear polarized frequencies into circularly polarized frequencies. 


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